National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

McKinney - McKinney National Airport (KTKI)

Lat: 33.18°NLon: 96.59°WElev: 584ft.

Fair

67°F

19°C

Humidity 97%
Wind Speed NE 3 mph
Barometer 30.01 in (1016.0 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 21 May 4:53 am CDT
Extended Forecast for

Lucas TX

  • Overnight

    Overnight: A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a steady temperature around 70. Calm wind.

    Low: 70 °F

    Slight Chance
    T-storms

  • Thursday

    Thursday: Showers and thunderstorms likely, mainly after 4pm. Cloudy, with a high near 78. East wind 5 to 10 mph. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 78 °F

    Chance
    T-storms then
    T-storms
    Likely

  • Thursday Night

    Thursday Night: Showers and thunderstorms likely, mainly before 1am. Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 65. North wind 5 to 10 mph becoming southeast after midnight. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 65 °F

    T-storms
    Likely then
    Chance
    T-storms and
    Patchy Fog

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 82. South wind around 5 mph.

    High: 82 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 67. Southeast wind around 5 mph becoming calm after midnight. Chance of precipitation is 60%.

    Low: 67 °F

    Chance
    T-storms then
    Showers
    Likely

  • Saturday

    Saturday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 82. South southeast wind around 5 mph. Chance of precipitation is 60%.

    High: 82 °F

    Chance
    T-storms then
    Showers
    Likely

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm. Low around 66. Southeast wind 5 to 10 mph becoming light after midnight. Chance of precipitation is 80%.

    Low: 66 °F

    Showers

  • Sunday

    Sunday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 79. East wind around 5 mph. Chance of precipitation is 60%.

    High: 79 °F

    Chance
    T-storms then
    Showers
    Likely

  • Sunday Night

    Sunday Night: A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 65. Northeast wind around 5 mph becoming calm in the evening.

    Low: 65 °F

    Chance
    T-storms

Detailed Forecast

Overnight
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a steady temperature around 70. Calm wind.
Thursday
Showers and thunderstorms likely, mainly after 4pm. Cloudy, with a high near 78. East wind 5 to 10 mph. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.
Thursday Night
Showers and thunderstorms likely, mainly before 1am. Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 65. North wind 5 to 10 mph becoming southeast after midnight. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Friday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 82. South wind around 5 mph.
Friday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 67. Southeast wind around 5 mph becoming calm after midnight. Chance of precipitation is 60%.
Saturday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 82. South southeast wind around 5 mph. Chance of precipitation is 60%.
Saturday Night
Showers and possibly a thunderstorm. Low around 66. Southeast wind 5 to 10 mph becoming light after midnight. Chance of precipitation is 80%.
Sunday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 79. East wind around 5 mph. Chance of precipitation is 60%.
Sunday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 65. Northeast wind around 5 mph becoming calm in the evening.
Memorial Day
A 50 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 81.
Monday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 66.
Tuesday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 83.
Tuesday Night
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 68.
Wednesday
Showers and thunderstorms likely. Mostly cloudy, with a high near 83. Chance of precipitation is 60%.
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ABOUT THIS FORECAST

 
Point Forecast:
Lucas TX
 33.08°N 96.57°W (Elev. 499 ft)
Last Update:
1:27 am CDT May 21, 2026
Forecast Valid:
5am CDT May 21, 2026-6pm CDT May 27, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation